1/*---------------------------------------------------------------------------
2 *
3 * Ryu floating-point output.
4 *
5 * Portions Copyright (c) 2018-2019, PostgreSQL Global Development Group
6 *
7 * IDENTIFICATION
8 * src/include/common/shortest_dec.h
9 *
10 * This is a modification of code taken from github.com/ulfjack/ryu under the
11 * terms of the Boost license (not the Apache license). The original copyright
12 * notice follows:
13 *
14 * Copyright 2018 Ulf Adams
15 *
16 * The contents of this file may be used under the terms of the Apache
17 * License, Version 2.0.
18 *
19 * (See accompanying file LICENSE-Apache or copy at
20 * http://www.apache.org/licenses/LICENSE-2.0)
21 *
22 * Alternatively, the contents of this file may be used under the terms of the
23 * Boost Software License, Version 1.0.
24 *
25 * (See accompanying file LICENSE-Boost or copy at
26 * https://www.boost.org/LICENSE_1_0.txt)
27 *
28 * Unless required by applicable law or agreed to in writing, this software is
29 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
30 * KIND, either express or implied.
31 *
32 *---------------------------------------------------------------------------
33 */
34#ifndef SHORTEST_DEC_H
35#define SHORTEST_DEC_H
36
37/*----
38 * The length of 25 comes from:
39 *
40 * Case 1: -9.9999999999999999e-299 = 24 bytes, plus 1 for null
41 *
42 * Case 2: -0.00099999999999999999 = 23 bytes, plus 1 for null
43 */
44#define DOUBLE_SHORTEST_DECIMAL_LEN 25
45
46int double_to_shortest_decimal_bufn(double f, char *result);
47int double_to_shortest_decimal_buf(double f, char *result);
48char *double_to_shortest_decimal(double f);
49
50/*
51 * The length of 16 comes from:
52 *
53 * Case 1: -9.99999999e+29 = 15 bytes, plus 1 for null
54 *
55 * Case 2: -0.000999999999 = 15 bytes, plus 1 for null
56 */
57#define FLOAT_SHORTEST_DECIMAL_LEN 16
58
59int float_to_shortest_decimal_bufn(float f, char *result);
60int float_to_shortest_decimal_buf(float f, char *result);
61char *float_to_shortest_decimal(float f);
62
63#endif /* SHORTEST_DEC_H */
64